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Represents a private key used in asymmetric cryptography. Private keys are typically generated using an AsymmetricKeyBuilder or any of the subclasses inheriting from it. This class also provides methods to export and check the properties of private keys.

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See

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Extends

  • BaseCryptoClass

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Accessors

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exportable

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Get Signature

get exportable(): boolean Check whether the private key is exportable.
Returns
boolean True if the key is exportable, false otherwise.

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purposes

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Get Signature

get purposes(): KeyPurpose[] Get the purposes enabled for this private key.
Returns
KeyPurpose[] An array with the purposes enabled for this key.

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Methods

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exportDer()

exportDer(): Promise<ArrayBuffer> Export the private key as a DER-encoded blob.

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Returns

Promise<ArrayBuffer> A promise that resolves to an ArrayBuffer containing the DER-encoded key.

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Remarks

Private keys are exported in PKCS#8 format.
Last modified on October 2, 2025